Ambush Predator: If it has successfully crept up on its prey, it automatically wins Initiative in the first round of combat and gains a +3 to its Attack Total for the first round only.Camouflage: Add +3 to all rolls to hide, whenever the creature is not moving.CraftyGrapple: The creature may make a grapple attack instead of a normal attack. This attack may only be employed against an opponent that is less than or equal to the creature’s (Size + 1). See Non-Lethal Combat (ArM5, page 174) for rules ongrappling. If the creature has another natural weapon (such as a bite), it may add its current Grapple Strength to its Attack Total in subsequent rounds, until the opponent breaks free. The creature must defend against any opponent outside the grapple with its Grapple Defense (see Natural Weapons Table, below).Loathsome Appearance: Presence drops to –6 or +3 when attempting to scare or intimidate an opponent.Skilled Climber: Add +3 to all rolls involving climbing.Thick Fur/Thick Scales: Add 1 to Protection; this Quality stacks with the Tough Virtue and the Tough Hide Quality.Tough Hide: Add 2 to Protection; this Quality stacks with the Tough Virtue and the Thick Fur Quality.Venomous: Compare the creature bite’s Attack Advantage to the victim’s Protection (not Soak). If the creature’s Advantage is higher, then the victim suffers the effect of the venom, regardless of whether the bite inflicts an actual wound. The Ease Factor to avoid damage is 15 (see ArM5, page 180).Web-Weaver: Not listed in book.

Concept : A subterranean analog to the many mythic sea creatures that lure sailors and such to their death, this giant spider lures would-be spelunkers into her webs*, and from there a certain death, unless you can appeal to her meddlesome and politicking nature.

After the bonding, she delights in learning of human politics, and meddles in the lives of the covenant’s children as a side hobby. Also, I really like the image of a bookworm spider wearing glasses and playing 4 violins.
Oh, and she’s fertile and spawns (typically) non-magical giant spiders. Which, handled properly, could generate an entire new revenue stream, I suppose. Phoenix Covenant felt like they had enough on their hands already, I guess.

Mythology (or “Why Enchanting Music?”): Sirens lure sailors to the rocky shores with lust because they’ve been on a boat without women for far too long. When you’re underground….

Men dig under the earth for sport and for greed. A mythic creature which lured such men to their dooms wouldn’t pull on their loins, she would pull on their pocketbooks and their sense of adventure. Theraphosa’s song is, “Don’t let them see you slip down this other path! You don’t want to share the spoils to be found here.”

With her Enchanting Music, the sound of her chittinous shivers amid skulls can make men curious, can make them greedy. But the description also talks about instilling general urges without lyrics, and this made me picture a couple of miners, lost in the Silent Dark, wondering if that sound in the distance is water dripping on ore. Oh, they should go back, but….they can hear something up ahead, and they tell themselves, “Just one more tunnel down. Then I’ll go back.”